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#1 |
New Member
Zhaotianxing
Join Date: Jun 2016
Posts: 4
Rep Power: 10 ![]() |
Please tell me how to test openfoam parallel benchmark on linux cluster? Which case is suitable to do it ? cavity of icofoam or dambreak of interfoam ? Because when i test openfoam benchmark on linux with interfoam solver , I change the cells to this :
blocks ( hex (0 1 5 4 12 13 17 16) (92 32 2) simpleGrading (1 1 1) hex (2 3 7 6 14 15 19 18) (76 32 2) simpleGrading (1 1 1) hex (4 5 9 8 16 17 21 20) (92 168 2) simpleGrading (1 1 1) hex (5 6 10 9 17 18 22 21) (16 168 2) simpleGrading (1 1 1) hex (6 7 11 10 18 19 23 22) (76 168 2) simpleGrading (1 1 1) ); But ,when I test with 56cores ,the test time is shortest . When I go on increasing the cpu cores ,the test time will become longer! I want to konw how to test openfoam benchmark with the right way so that I can obtian the test results like this : http://www.hpcadvisorycouncil.com/pd...e_Analysis.pdf |
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#2 |
Senior Member
Taher Chegini
Join Date: Nov 2014
Location: Houston, Texas
Posts: 125
Rep Power: 13 ![]() |
I have found a paper that explains the process with details:
http://www.dtic.mil/get-tr-doc/pdf?AD=ADA612337 You can try to setup similar cases. |
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#3 |
Super Moderator
Tobias Holzmann
Join Date: Oct 2010
Location: Bad Wörishofen
Posts: 2,712
Blog Entries: 6
Rep Power: 52 ![]() ![]() ![]() |
A benchmark of scaling should be done with a large case. Imagine you have a testcase with 20.000 cells and a normal one phase solver. There is finally not much to calculate and using 10 cores would slow down the whole simulation because each processor is waiting for the other one's information. I have in mind that you should have round about 10.000 to 30.000 per CPU. However, it also depends highly on the problem you want to solve and the corresponding model. Other impacts on the speed:
__________________
Keep foaming, Tobias Holzmann |
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#4 |
New Member
Zhaotianxing
Join Date: Jun 2016
Posts: 4
Rep Power: 10 ![]() |
thanks a lot , i will read it carefully to find the solutions.
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#5 | |
New Member
Zhaotianxing
Join Date: Jun 2016
Posts: 4
Rep Power: 10 ![]() |
Quote:
thanks a lot ,I will find a proper sample to test benchmark of openfoam. |
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#6 | |
New Member
Zhaotianxing
Join Date: Jun 2016
Posts: 4
Rep Power: 10 ![]() |
Quote:
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